This skill will aid you in making a critical hit with the backstab skills. Use this skill before you backstab a target. The effects of this skill do not stack. Training in the assess skill make this skill more effective. This skill provides bonuses to: backstab, stab, blind, arterial slash, nerve strike, hamstring.
This skill is fairly useful in conserving your EP by spending a very small cost to increase the chance that your next hit will be a critical. Very useful for making sure every last skill counts if you're among the first to tap, but if you're not have a trouble with how fast you tap, it's probably better not to use this so you can use your skills faster.